機器
accuracy
apparatus
arrangement
closeup
cog
cogs
cogwheel
concept
conceptual
connecting
connection
cooperation
design
detail
development
dimensional
drive
engineer
engineering
equipment
factory
gear
gear wheel
gearing
industrial
industry
iron
machinery
machines
manufacturing
mechanic
mechanical
mechanics
mechanism
metal
metallic
motion
old
part
power
precision
steel
technology
tool
tooth
vintage
wheel
work